./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1cb4eb95fbb86e81adddda10624c3164b4456d4761ce2ac967ea89c58c777ea3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:13:19,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:13:19,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:13:19,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:13:19,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:13:19,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:13:19,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:13:19,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:13:19,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:13:19,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:13:19,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:13:19,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:13:19,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:13:19,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:13:19,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:13:19,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:13:19,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:13:19,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:13:19,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:13:19,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:13:19,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:13:19,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:13:19,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:13:19,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:13:19,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:13:19,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:13:19,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:13:19,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:13:19,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:13:19,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:13:19,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:13:19,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:13:19,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:13:19,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:13:19,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:13:19,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:13:19,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:13:19,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:13:19,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:13:19,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:13:19,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:13:19,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:13:19,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:13:19,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:13:19,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:13:19,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:13:19,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:13:19,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:13:19,829 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:13:19,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:13:19,830 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:13:19,830 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:13:19,830 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:13:19,830 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:13:19,830 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:13:19,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:13:19,831 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:13:19,831 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:13:19,831 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:13:19,831 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:13:19,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:13:19,832 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:13:19,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:13:19,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:13:19,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:13:19,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:13:19,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:13:19,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:13:19,833 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:13:19,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:13:19,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:13:19,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:13:19,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:13:19,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:13:19,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:13:19,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:13:19,835 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:13:19,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:13:19,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:13:19,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:13:19,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:13:19,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:13:19,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:13:19,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cb4eb95fbb86e81adddda10624c3164b4456d4761ce2ac967ea89c58c777ea3 [2022-12-14 13:13:20,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:13:20,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:13:20,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:13:20,027 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:13:20,027 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:13:20,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c [2022-12-14 13:13:22,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:13:22,970 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:13:22,970 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c [2022-12-14 13:13:23,001 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/data/f173f6ed1/a586d41d86874dcd827439be8e0a7da5/FLAG2849371e3 [2022-12-14 13:13:23,124 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/data/f173f6ed1/a586d41d86874dcd827439be8e0a7da5 [2022-12-14 13:13:23,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:13:23,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:13:23,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:13:23,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:13:23,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:13:23,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:23" (1/1) ... [2022-12-14 13:13:23,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2b94b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:23, skipping insertion in model container [2022-12-14 13:13:23,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:13:23" (1/1) ... [2022-12-14 13:13:23,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:13:23,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:13:24,656 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[380593,380606] [2022-12-14 13:13:24,679 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[383339,383352] [2022-12-14 13:13:24,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:13:24,824 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:13:25,633 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[380593,380606] [2022-12-14 13:13:25,637 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[383339,383352] [2022-12-14 13:13:25,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:13:25,683 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:13:25,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25 WrapperNode [2022-12-14 13:13:25,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:13:25,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:13:25,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:13:25,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:13:25,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:25,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:25,976 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2022-12-14 13:13:25,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:13:25,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:13:25,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:13:25,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:13:25,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:25,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:13:26,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:13:26,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:13:26,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:13:26,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (1/1) ... [2022-12-14 13:13:26,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:13:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:26,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:13:26,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:13:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:13:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:13:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:13:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:13:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:13:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:13:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:13:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:13:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:13:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:13:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:13:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:13:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:13:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:13:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:13:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:13:26,460 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:13:26,461 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:13:31,896 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:13:33,183 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:13:33,184 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-14 13:13:33,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:33 BoogieIcfgContainer [2022-12-14 13:13:33,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:13:33,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:13:33,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:13:33,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:13:33,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:13:23" (1/3) ... [2022-12-14 13:13:33,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232fcf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:33, skipping insertion in model container [2022-12-14 13:13:33,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:13:25" (2/3) ... [2022-12-14 13:13:33,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232fcf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:13:33, skipping insertion in model container [2022-12-14 13:13:33,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:13:33" (3/3) ... [2022-12-14 13:13:33,194 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.04.cil-1.c [2022-12-14 13:13:33,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:13:33,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 13:13:33,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:13:33,278 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2fba1034, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:13:33,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 13:13:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 13:13:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 13:13:33,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:33,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:33,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash -417535952, now seen corresponding path program 1 times [2022-12-14 13:13:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714615146] [2022-12-14 13:13:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:13:33,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:33,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714615146] [2022-12-14 13:13:33,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714615146] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:33,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:33,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:13:33,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889429723] [2022-12-14 13:13:33,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:33,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:13:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:13:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:33,577 INFO L87 Difference]: Start difference. First operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:13:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:34,247 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2022-12-14 13:13:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:13:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-12-14 13:13:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:34,263 INFO L225 Difference]: With dead ends: 3569 [2022-12-14 13:13:34,264 INFO L226 Difference]: Without dead ends: 1825 [2022-12-14 13:13:34,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:13:34,272 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:34,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:13:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-12-14 13:13:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2022-12-14 13:13:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1778 states have (on average 1.9482564679415073) internal successors, (3464), 1781 states have internal predecessors, (3464), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-12-14 13:13:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2022-12-14 13:13:34,356 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2022-12-14 13:13:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:34,356 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2022-12-14 13:13:34,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:13:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2022-12-14 13:13:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:13:34,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:34,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:34,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:13:34,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash -34756968, now seen corresponding path program 1 times [2022-12-14 13:13:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:34,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661657870] [2022-12-14 13:13:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:13:34,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661657870] [2022-12-14 13:13:34,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661657870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915213504] [2022-12-14 13:13:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:34,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:34,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:13:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:13:34,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:13:34,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:34,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915213504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:34,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:34,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:13:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079851826] [2022-12-14 13:13:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:34,666 INFO L87 Difference]: Start difference. First operand 1824 states and 3528 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:13:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:34,998 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2022-12-14 13:13:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-12-14 13:13:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:35,005 INFO L225 Difference]: With dead ends: 2173 [2022-12-14 13:13:35,006 INFO L226 Difference]: Without dead ends: 1995 [2022-12-14 13:13:35,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:35,008 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3381 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:35,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3381 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-12-14 13:13:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2022-12-14 13:13:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1907 states have (on average 1.9113791295228106) internal successors, (3645), 1911 states have internal predecessors, (3645), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 13:13:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2022-12-14 13:13:35,051 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2022-12-14 13:13:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:35,051 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2022-12-14 13:13:35,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:13:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2022-12-14 13:13:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:13:35,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:35,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:35,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:13:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 13:13:35,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:35,255 INFO L85 PathProgramCache]: Analyzing trace with hash 681208504, now seen corresponding path program 1 times [2022-12-14 13:13:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590211487] [2022-12-14 13:13:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:13:35,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:35,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590211487] [2022-12-14 13:13:35,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590211487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:35,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596604893] [2022-12-14 13:13:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:35,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:35,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:35,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:13:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:13:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:13:35,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:35,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596604893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:35,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:35,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:13:35,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162956013] [2022-12-14 13:13:35,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:35,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:35,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:35,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:35,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:35,490 INFO L87 Difference]: Start difference. First operand 1991 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:13:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:35,861 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2022-12-14 13:13:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-12-14 13:13:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:35,868 INFO L225 Difference]: With dead ends: 2668 [2022-12-14 13:13:35,868 INFO L226 Difference]: Without dead ends: 2323 [2022-12-14 13:13:35,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:35,871 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 3384 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:35,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3384 Valid, 3311 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-12-14 13:13:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2022-12-14 13:13:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2159 states have (on average 1.8503937007874016) internal successors, (3995), 2165 states have internal predecessors, (3995), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 13:13:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2022-12-14 13:13:35,955 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2022-12-14 13:13:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:35,956 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2022-12-14 13:13:35,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:13:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2022-12-14 13:13:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:13:35,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:35,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:35,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:13:36,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:36,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1200992920, now seen corresponding path program 1 times [2022-12-14 13:13:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:36,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135491831] [2022-12-14 13:13:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:13:36,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135491831] [2022-12-14 13:13:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135491831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:36,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:13:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338465242] [2022-12-14 13:13:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:36,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:36,234 INFO L87 Difference]: Start difference. First operand 2317 states and 4211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:13:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:36,634 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2022-12-14 13:13:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-12-14 13:13:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:36,642 INFO L225 Difference]: With dead ends: 2839 [2022-12-14 13:13:36,642 INFO L226 Difference]: Without dead ends: 2493 [2022-12-14 13:13:36,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:36,645 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:36,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-12-14 13:13:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2022-12-14 13:13:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2255 states have (on average 1.8425720620842572) internal successors, (4155), 2261 states have internal predecessors, (4155), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-12-14 13:13:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2022-12-14 13:13:36,699 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2022-12-14 13:13:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:36,699 INFO L495 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2022-12-14 13:13:36,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:13:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2022-12-14 13:13:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 13:13:36,701 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:36,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:13:36,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash -458771257, now seen corresponding path program 1 times [2022-12-14 13:13:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:36,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326264126] [2022-12-14 13:13:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:36,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 13:13:36,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:36,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326264126] [2022-12-14 13:13:36,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326264126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:36,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:36,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:13:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240048499] [2022-12-14 13:13:36,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:36,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:36,760 INFO L87 Difference]: Start difference. First operand 2421 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:13:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:37,119 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2022-12-14 13:13:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-12-14 13:13:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:37,133 INFO L225 Difference]: With dead ends: 3934 [2022-12-14 13:13:37,133 INFO L226 Difference]: Without dead ends: 3159 [2022-12-14 13:13:37,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:37,137 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:37,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3375 Valid, 3294 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-12-14 13:13:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2022-12-14 13:13:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2827 states have (on average 1.7541563494870889) internal successors, (4959), 2837 states have internal predecessors, (4959), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-12-14 13:13:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2022-12-14 13:13:37,236 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2022-12-14 13:13:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:37,236 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2022-12-14 13:13:37,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:13:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2022-12-14 13:13:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 13:13:37,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:37,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:37,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:13:37,240 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash 971989608, now seen corresponding path program 1 times [2022-12-14 13:13:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:37,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630063663] [2022-12-14 13:13:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 13:13:37,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630063663] [2022-12-14 13:13:37,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630063663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:37,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:13:37,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:13:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652063673] [2022-12-14 13:13:37,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:37,292 INFO L87 Difference]: Start difference. First operand 3145 states and 5383 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:13:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:37,633 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2022-12-14 13:13:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:37,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-12-14 13:13:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:37,651 INFO L225 Difference]: With dead ends: 6070 [2022-12-14 13:13:37,651 INFO L226 Difference]: Without dead ends: 4571 [2022-12-14 13:13:37,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:13:37,656 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:37,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3378 Valid, 3292 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:13:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-12-14 13:13:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2022-12-14 13:13:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3931 states have (on average 1.6502162299669296) internal successors, (6487), 3949 states have internal predecessors, (6487), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-12-14 13:13:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2022-12-14 13:13:37,836 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2022-12-14 13:13:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:37,837 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2022-12-14 13:13:37,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:13:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2022-12-14 13:13:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:13:37,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:37,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:13:37,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 671081618, now seen corresponding path program 1 times [2022-12-14 13:13:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650448468] [2022-12-14 13:13:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:37,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:13:37,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650448468] [2022-12-14 13:13:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650448468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:37,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803634386] [2022-12-14 13:13:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:37,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:37,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:37,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:37,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:13:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:13:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:13:38,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:38,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803634386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:38,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:38,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:13:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807359492] [2022-12-14 13:13:38,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:38,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:38,098 INFO L87 Difference]: Start difference. First operand 4545 states and 7295 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:38,556 INFO L93 Difference]: Finished difference Result 6981 states and 10769 transitions. [2022-12-14 13:13:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-12-14 13:13:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:38,580 INFO L225 Difference]: With dead ends: 6981 [2022-12-14 13:13:38,580 INFO L226 Difference]: Without dead ends: 5495 [2022-12-14 13:13:38,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:38,586 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 68 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:38,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6410 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-12-14 13:13:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5053. [2022-12-14 13:13:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 4391 states have (on average 1.6467774994306537) internal successors, (7231), 4409 states have internal predecessors, (7231), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2022-12-14 13:13:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2022-12-14 13:13:38,785 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2022-12-14 13:13:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:38,785 INFO L495 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2022-12-14 13:13:38,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2022-12-14 13:13:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:13:38,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:38,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:38,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:13:38,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:38,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1729513729, now seen corresponding path program 1 times [2022-12-14 13:13:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:38,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159614794] [2022-12-14 13:13:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:39,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:13:39,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:39,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159614794] [2022-12-14 13:13:39,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159614794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:39,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596608014] [2022-12-14 13:13:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:39,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:39,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:39,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:39,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:13:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:39,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:13:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:13:39,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:39,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596608014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:39,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:39,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:13:39,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531968024] [2022-12-14 13:13:39,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:39,227 INFO L87 Difference]: Start difference. First operand 5053 states and 8087 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:39,682 INFO L93 Difference]: Finished difference Result 8017 states and 12365 transitions. [2022-12-14 13:13:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-12-14 13:13:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:39,701 INFO L225 Difference]: With dead ends: 8017 [2022-12-14 13:13:39,702 INFO L226 Difference]: Without dead ends: 6271 [2022-12-14 13:13:39,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:39,707 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 74 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:39,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6423 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-12-14 13:13:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 5773. [2022-12-14 13:13:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 5039 states have (on average 1.6398094860091288) internal successors, (8263), 5057 states have internal predecessors, (8263), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2022-12-14 13:13:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2022-12-14 13:13:39,838 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2022-12-14 13:13:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:39,839 INFO L495 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2022-12-14 13:13:39,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2022-12-14 13:13:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:13:39,846 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:39,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:39,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:13:40,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:40,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash 794555572, now seen corresponding path program 1 times [2022-12-14 13:13:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:40,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840486916] [2022-12-14 13:13:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 13:13:40,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840486916] [2022-12-14 13:13:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840486916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001043050] [2022-12-14 13:13:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:40,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:40,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:13:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:13:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:13:40,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:40,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001043050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:40,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:40,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:13:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471931112] [2022-12-14 13:13:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:40,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:40,368 INFO L87 Difference]: Start difference. First operand 5773 states and 9191 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:40,798 INFO L93 Difference]: Finished difference Result 9513 states and 14663 transitions. [2022-12-14 13:13:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-12-14 13:13:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:40,819 INFO L225 Difference]: With dead ends: 9513 [2022-12-14 13:13:40,820 INFO L226 Difference]: Without dead ends: 7371 [2022-12-14 13:13:40,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:40,827 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 80 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:40,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6428 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-12-14 13:13:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 6817. [2022-12-14 13:13:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6817 states, 5975 states have (on average 1.6299581589958159) internal successors, (9739), 5993 states have internal predecessors, (9739), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2022-12-14 13:13:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2022-12-14 13:13:40,995 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2022-12-14 13:13:40,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:40,995 INFO L495 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2022-12-14 13:13:40,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2022-12-14 13:13:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:13:41,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:41,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:41,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:13:41,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:41,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1353667866, now seen corresponding path program 1 times [2022-12-14 13:13:41,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498063934] [2022-12-14 13:13:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:41,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 13:13:41,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:41,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498063934] [2022-12-14 13:13:41,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498063934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:41,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283010470] [2022-12-14 13:13:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:41,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:41,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:41,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:41,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:13:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:41,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:13:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:13:41,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283010470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:41,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:41,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:13:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025096585] [2022-12-14 13:13:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:13:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:13:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:41,415 INFO L87 Difference]: Start difference. First operand 6817 states and 10775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:41,866 INFO L93 Difference]: Finished difference Result 11379 states and 17534 transitions. [2022-12-14 13:13:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:13:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-12-14 13:13:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:41,883 INFO L225 Difference]: With dead ends: 11379 [2022-12-14 13:13:41,883 INFO L226 Difference]: Without dead ends: 8688 [2022-12-14 13:13:41,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:13:41,889 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 62 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:41,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6413 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:13:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2022-12-14 13:13:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8302. [2022-12-14 13:13:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 7298 states have (on average 1.6156481227733626) internal successors, (11791), 7316 states have internal predecessors, (11791), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2022-12-14 13:13:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2022-12-14 13:13:42,093 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2022-12-14 13:13:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:42,093 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2022-12-14 13:13:42,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:13:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2022-12-14 13:13:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:13:42,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:42,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:42,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:13:42,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:42,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1847835635, now seen corresponding path program 2 times [2022-12-14 13:13:42,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:42,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567911476] [2022-12-14 13:13:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:42,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:13:42,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567911476] [2022-12-14 13:13:42,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567911476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501481228] [2022-12-14 13:13:42,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:13:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:42,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:42,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:13:42,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:13:42,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:13:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:13:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:13:42,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:13:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501481228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424248022] [2022-12-14 13:13:43,182 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 13:13:43,182 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:13:43,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:13:43,190 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:13:43,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:13:47,541 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2022-12-14 13:13:47,572 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-12-14 13:13:47,971 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-12-14 13:16:28,294 WARN L233 SmtUtils]: Spent 2.66m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 13:19:11,597 WARN L233 SmtUtils]: Spent 2.72m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 13:19:11,633 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 143 for LOIs [2022-12-14 13:19:11,657 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2022-12-14 13:19:11,664 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 125 for LOIs [2022-12-14 13:19:11,692 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 121 for LOIs [2022-12-14 13:19:11,932 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2022-12-14 13:19:12,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:19:48,057 WARN L233 SmtUtils]: Spent 26.37s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:19:55,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130250#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 |#StackHeapBarrier|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-12-14 13:19:55,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:19:55,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:19:55,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-12-14 13:19:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473536608] [2022-12-14 13:19:55,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:19:55,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:19:55,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:19:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:19:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3353, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 13:19:55,253 INFO L87 Difference]: Start difference. First operand 8302 states and 12989 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 13:19:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:57,074 INFO L93 Difference]: Finished difference Result 23158 states and 34238 transitions. [2022-12-14 13:19:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 13:19:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 120 [2022-12-14 13:19:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:57,103 INFO L225 Difference]: With dead ends: 23158 [2022-12-14 13:19:57,103 INFO L226 Difference]: Without dead ends: 16503 [2022-12-14 13:19:57,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 323 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=972, Invalid=7038, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 13:19:57,112 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 11314 mSDsluCounter, 15974 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11314 SdHoareTripleChecker+Valid, 19217 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:57,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11314 Valid, 19217 Invalid, 2445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:19:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16503 states. [2022-12-14 13:19:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16503 to 14397. [2022-12-14 13:19:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14397 states, 12347 states have (on average 1.515428849113145) internal successors, (18711), 12373 states have internal predecessors, (18711), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-12-14 13:19:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14397 states to 14397 states and 21135 transitions. [2022-12-14 13:19:57,603 INFO L78 Accepts]: Start accepts. Automaton has 14397 states and 21135 transitions. Word has length 120 [2022-12-14 13:19:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:57,603 INFO L495 AbstractCegarLoop]: Abstraction has 14397 states and 21135 transitions. [2022-12-14 13:19:57,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 13:19:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 14397 states and 21135 transitions. [2022-12-14 13:19:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 13:19:57,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:57,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:57,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:19:57,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:19:57,816 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 339082013, now seen corresponding path program 1 times [2022-12-14 13:19:57,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:19:57,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981562339] [2022-12-14 13:19:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:19:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 13:19:57,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:19:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981562339] [2022-12-14 13:19:57,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981562339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:19:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527998534] [2022-12-14 13:19:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:57,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:57,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:57,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:19:57,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:19:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:19:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:19:58,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:19:58,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527998534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:19:58,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:19:58,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:19:58,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479859405] [2022-12-14 13:19:58,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:19:58,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:19:58,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:19:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:19:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:19:58,087 INFO L87 Difference]: Start difference. First operand 14397 states and 21135 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:19:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:58,850 INFO L93 Difference]: Finished difference Result 23617 states and 34470 transitions. [2022-12-14 13:19:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:19:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-12-14 13:19:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:58,879 INFO L225 Difference]: With dead ends: 23617 [2022-12-14 13:19:58,879 INFO L226 Difference]: Without dead ends: 14423 [2022-12-14 13:19:58,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:19:58,893 INFO L413 NwaCegarLoop]: 3251 mSDtfsCounter, 108 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:58,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 6413 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:19:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-12-14 13:19:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14229. [2022-12-14 13:19:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14229 states, 12179 states have (on average 1.4995484029887511) internal successors, (18263), 12205 states have internal predecessors, (18263), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-12-14 13:19:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14229 states to 14229 states and 20687 transitions. [2022-12-14 13:19:59,393 INFO L78 Accepts]: Start accepts. Automaton has 14229 states and 20687 transitions. Word has length 121 [2022-12-14 13:19:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:59,393 INFO L495 AbstractCegarLoop]: Abstraction has 14229 states and 20687 transitions. [2022-12-14 13:19:59,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:19:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 14229 states and 20687 transitions. [2022-12-14 13:19:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 13:19:59,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:59,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:59,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:19:59,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:19:59,605 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 451438205, now seen corresponding path program 1 times [2022-12-14 13:19:59,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:19:59,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99378065] [2022-12-14 13:19:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:59,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:19:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 13:19:59,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:19:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99378065] [2022-12-14 13:19:59,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99378065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:19:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212091101] [2022-12-14 13:19:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:59,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:19:59,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:19:59,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:19:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:19:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:19:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:19:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:19:59,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:19:59,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212091101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:19:59,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:19:59,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:19:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458197614] [2022-12-14 13:19:59,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:19:59,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:19:59,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:19:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:19:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:19:59,865 INFO L87 Difference]: Start difference. First operand 14229 states and 20687 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:00,634 INFO L93 Difference]: Finished difference Result 23244 states and 33370 transitions. [2022-12-14 13:20:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:20:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-12-14 13:20:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:00,655 INFO L225 Difference]: With dead ends: 23244 [2022-12-14 13:20:00,655 INFO L226 Difference]: Without dead ends: 14779 [2022-12-14 13:20:00,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:00,665 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3387 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:00,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3214 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:20:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14779 states. [2022-12-14 13:20:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14779 to 14779. [2022-12-14 13:20:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 12661 states have (on average 1.4855856567411736) internal successors, (18809), 12687 states have internal predecessors, (18809), 1234 states have call successors, (1234), 882 states have call predecessors, (1234), 882 states have return successors, (1234), 1210 states have call predecessors, (1234), 1234 states have call successors, (1234) [2022-12-14 13:20:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 21277 transitions. [2022-12-14 13:20:01,194 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 21277 transitions. Word has length 121 [2022-12-14 13:20:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:01,194 INFO L495 AbstractCegarLoop]: Abstraction has 14779 states and 21277 transitions. [2022-12-14 13:20:01,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 21277 transitions. [2022-12-14 13:20:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 13:20:01,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:01,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:01,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:20:01,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:01,408 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash 289150798, now seen corresponding path program 1 times [2022-12-14 13:20:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985270995] [2022-12-14 13:20:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 13:20:01,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985270995] [2022-12-14 13:20:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985270995] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613103736] [2022-12-14 13:20:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:01,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:01,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:01,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:20:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:01,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:20:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:20:01,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:01,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613103736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:01,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:01,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 13:20:01,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945807286] [2022-12-14 13:20:01,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:01,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:01,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:20:01,750 INFO L87 Difference]: Start difference. First operand 14779 states and 21277 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:20:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:02,909 INFO L93 Difference]: Finished difference Result 32795 states and 45831 transitions. [2022-12-14 13:20:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:20:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 122 [2022-12-14 13:20:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:02,943 INFO L225 Difference]: With dead ends: 32795 [2022-12-14 13:20:02,943 INFO L226 Difference]: Without dead ends: 19663 [2022-12-14 13:20:02,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:20:02,957 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3594 mSDsluCounter, 6295 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3607 SdHoareTripleChecker+Valid, 9476 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:02,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3607 Valid, 9476 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:20:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-12-14 13:20:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19661. [2022-12-14 13:20:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19661 states, 16655 states have (on average 1.4428700090063045) internal successors, (24031), 16693 states have internal predecessors, (24031), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-12-14 13:20:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19661 states to 19661 states and 27543 transitions. [2022-12-14 13:20:03,782 INFO L78 Accepts]: Start accepts. Automaton has 19661 states and 27543 transitions. Word has length 122 [2022-12-14 13:20:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:03,783 INFO L495 AbstractCegarLoop]: Abstraction has 19661 states and 27543 transitions. [2022-12-14 13:20:03,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:20:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 19661 states and 27543 transitions. [2022-12-14 13:20:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:20:03,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:03,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:03,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:20:03,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:03,997 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 74382647, now seen corresponding path program 1 times [2022-12-14 13:20:03,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399564097] [2022-12-14 13:20:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:03,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 13:20:04,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:04,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399564097] [2022-12-14 13:20:04,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399564097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:04,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937358371] [2022-12-14 13:20:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:04,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:04,143 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:04,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:20:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:20:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:20:04,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:04,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937358371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:04,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:04,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:20:04,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772451483] [2022-12-14 13:20:04,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:04,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:20:04,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:20:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:04,279 INFO L87 Difference]: Start difference. First operand 19661 states and 27543 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:20:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:05,344 INFO L93 Difference]: Finished difference Result 32603 states and 45621 transitions. [2022-12-14 13:20:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:20:05,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2022-12-14 13:20:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:05,376 INFO L225 Difference]: With dead ends: 32603 [2022-12-14 13:20:05,376 INFO L226 Difference]: Without dead ends: 19699 [2022-12-14 13:20:05,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:05,394 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 101 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:05,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:20:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19699 states. [2022-12-14 13:20:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19699 to 19445. [2022-12-14 13:20:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19445 states, 16439 states have (on average 1.4238700650891174) internal successors, (23407), 16477 states have internal predecessors, (23407), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-12-14 13:20:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19445 states to 19445 states and 26919 transitions. [2022-12-14 13:20:06,318 INFO L78 Accepts]: Start accepts. Automaton has 19445 states and 26919 transitions. Word has length 125 [2022-12-14 13:20:06,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:06,318 INFO L495 AbstractCegarLoop]: Abstraction has 19445 states and 26919 transitions. [2022-12-14 13:20:06,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:20:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 19445 states and 26919 transitions. [2022-12-14 13:20:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:20:06,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:06,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:06,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:20:06,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:20:06,531 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1513890071, now seen corresponding path program 1 times [2022-12-14 13:20:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029593990] [2022-12-14 13:20:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:06,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 13:20:06,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:06,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029593990] [2022-12-14 13:20:06,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029593990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:06,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887703859] [2022-12-14 13:20:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:06,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:06,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:20:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:06,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:20:06,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 13:20:06,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:06,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887703859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:06,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:06,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 13:20:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478511930] [2022-12-14 13:20:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:20:06,795 INFO L87 Difference]: Start difference. First operand 19445 states and 26919 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:20:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:08,063 INFO L93 Difference]: Finished difference Result 28427 states and 38917 transitions. [2022-12-14 13:20:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:20:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2022-12-14 13:20:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:08,093 INFO L225 Difference]: With dead ends: 28427 [2022-12-14 13:20:08,093 INFO L226 Difference]: Without dead ends: 20213 [2022-12-14 13:20:08,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:20:08,105 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3393 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:08,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 6575 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:20:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20213 states. [2022-12-14 13:20:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20213 to 19842. [2022-12-14 13:20:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19842 states, 16775 states have (on average 1.4193144560357676) internal successors, (23809), 16837 states have internal predecessors, (23809), 1764 states have call successors, (1764), 1253 states have call predecessors, (1764), 1301 states have return successors, (1812), 1752 states have call predecessors, (1812), 1764 states have call successors, (1812) [2022-12-14 13:20:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 27385 transitions. [2022-12-14 13:20:09,128 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 27385 transitions. Word has length 125 [2022-12-14 13:20:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:09,128 INFO L495 AbstractCegarLoop]: Abstraction has 19842 states and 27385 transitions. [2022-12-14 13:20:09,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:20:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 27385 transitions. [2022-12-14 13:20:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:20:09,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:09,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:09,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:20:09,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:20:09,341 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1605279668, now seen corresponding path program 1 times [2022-12-14 13:20:09,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:09,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682919678] [2022-12-14 13:20:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 13:20:09,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:09,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682919678] [2022-12-14 13:20:09,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682919678] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:09,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774059469] [2022-12-14 13:20:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:09,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:09,482 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:09,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:20:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:20:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 13:20:09,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:09,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774059469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:09,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:09,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:20:09,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088719226] [2022-12-14 13:20:09,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:20:09,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:20:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:09,585 INFO L87 Difference]: Start difference. First operand 19842 states and 27385 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:10,672 INFO L93 Difference]: Finished difference Result 27584 states and 37811 transitions. [2022-12-14 13:20:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:20:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-12-14 13:20:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:10,704 INFO L225 Difference]: With dead ends: 27584 [2022-12-14 13:20:10,704 INFO L226 Difference]: Without dead ends: 18818 [2022-12-14 13:20:10,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:10,719 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 28 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6351 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:10,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6351 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:20:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2022-12-14 13:20:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18190. [2022-12-14 13:20:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18190 states, 15339 states have (on average 1.42812438881283) internal successors, (21906), 15365 states have internal predecessors, (21906), 1680 states have call successors, (1680), 1169 states have call predecessors, (1680), 1169 states have return successors, (1680), 1656 states have call predecessors, (1680), 1680 states have call successors, (1680) [2022-12-14 13:20:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 25266 transitions. [2022-12-14 13:20:11,506 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 25266 transitions. Word has length 126 [2022-12-14 13:20:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:11,506 INFO L495 AbstractCegarLoop]: Abstraction has 18190 states and 25266 transitions. [2022-12-14 13:20:11,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 25266 transitions. [2022-12-14 13:20:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:20:11,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:11,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:11,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:20:11,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:11,719 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -478120855, now seen corresponding path program 1 times [2022-12-14 13:20:11,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722709932] [2022-12-14 13:20:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:11,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 13:20:11,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722709932] [2022-12-14 13:20:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722709932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706892445] [2022-12-14 13:20:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:11,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:11,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:11,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:20:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:20:11,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:20:12,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:12,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706892445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:12,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:12,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 13:20:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195497572] [2022-12-14 13:20:12,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:12,039 INFO L87 Difference]: Start difference. First operand 18190 states and 25266 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:20:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:13,662 INFO L93 Difference]: Finished difference Result 40841 states and 55172 transitions. [2022-12-14 13:20:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:20:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 13:20:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:13,702 INFO L225 Difference]: With dead ends: 40841 [2022-12-14 13:20:13,702 INFO L226 Difference]: Without dead ends: 24343 [2022-12-14 13:20:13,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:20:13,720 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 6931 mSDsluCounter, 6254 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6944 SdHoareTripleChecker+Valid, 9429 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:13,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6944 Valid, 9429 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:20:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24343 states. [2022-12-14 13:20:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24343 to 24341. [2022-12-14 13:20:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24341 states, 20293 states have (on average 1.3842704380820974) internal successors, (28091), 20331 states have internal predecessors, (28091), 2391 states have call successors, (2391), 1655 states have call predecessors, (2391), 1655 states have return successors, (2391), 2355 states have call predecessors, (2391), 2391 states have call successors, (2391) [2022-12-14 13:20:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24341 states to 24341 states and 32873 transitions. [2022-12-14 13:20:15,062 INFO L78 Accepts]: Start accepts. Automaton has 24341 states and 32873 transitions. Word has length 126 [2022-12-14 13:20:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:15,063 INFO L495 AbstractCegarLoop]: Abstraction has 24341 states and 32873 transitions. [2022-12-14 13:20:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:20:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 24341 states and 32873 transitions. [2022-12-14 13:20:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 13:20:15,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:15,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:15,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:20:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:20:15,284 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash 516373829, now seen corresponding path program 1 times [2022-12-14 13:20:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924276701] [2022-12-14 13:20:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:15,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:20:15,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:15,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924276701] [2022-12-14 13:20:15,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924276701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:15,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883470629] [2022-12-14 13:20:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:15,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:15,473 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:15,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:20:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:20:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:20:15,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883470629] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:15,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:15,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 13:20:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141898100] [2022-12-14 13:20:15,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:15,636 INFO L87 Difference]: Start difference. First operand 24341 states and 32873 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:20:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:17,879 INFO L93 Difference]: Finished difference Result 55575 states and 73353 transitions. [2022-12-14 13:20:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:20:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2022-12-14 13:20:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:17,937 INFO L225 Difference]: With dead ends: 55575 [2022-12-14 13:20:17,937 INFO L226 Difference]: Without dead ends: 32926 [2022-12-14 13:20:17,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:20:17,962 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3605 mSDsluCounter, 6297 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3618 SdHoareTripleChecker+Valid, 9464 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:17,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3618 Valid, 9464 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:20:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32926 states. [2022-12-14 13:20:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32926 to 32924. [2022-12-14 13:20:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32924 states, 27166 states have (on average 1.3439961716851947) internal successors, (36511), 27222 states have internal predecessors, (36511), 3408 states have call successors, (3408), 2348 states have call predecessors, (3408), 2348 states have return successors, (3408), 3354 states have call predecessors, (3408), 3408 states have call successors, (3408) [2022-12-14 13:20:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32924 states to 32924 states and 43327 transitions. [2022-12-14 13:20:20,077 INFO L78 Accepts]: Start accepts. Automaton has 32924 states and 43327 transitions. Word has length 128 [2022-12-14 13:20:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:20,078 INFO L495 AbstractCegarLoop]: Abstraction has 32924 states and 43327 transitions. [2022-12-14 13:20:20,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:20:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 32924 states and 43327 transitions. [2022-12-14 13:20:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 13:20:20,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:20,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:20,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:20:20,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:20,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1403149993, now seen corresponding path program 1 times [2022-12-14 13:20:20,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:20,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962785808] [2022-12-14 13:20:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:20,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 13:20:20,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962785808] [2022-12-14 13:20:20,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962785808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675746325] [2022-12-14 13:20:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:20,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:20,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:20,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:20,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:20:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:20:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:20:20,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:20,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675746325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:20,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:20,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 13:20:20,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441774718] [2022-12-14 13:20:20,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:20,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:20:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:20:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:20:20,558 INFO L87 Difference]: Start difference. First operand 32924 states and 43327 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:23,125 INFO L93 Difference]: Finished difference Result 59534 states and 77874 transitions. [2022-12-14 13:20:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:20:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 130 [2022-12-14 13:20:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:23,190 INFO L225 Difference]: With dead ends: 59534 [2022-12-14 13:20:23,190 INFO L226 Difference]: Without dead ends: 38293 [2022-12-14 13:20:23,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:20:23,218 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3356 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:23,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:20:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2022-12-14 13:20:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 37891. [2022-12-14 13:20:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37891 states, 31775 states have (on average 1.3173249409913454) internal successors, (41858), 31831 states have internal predecessors, (41858), 3465 states have call successors, (3465), 2649 states have call predecessors, (3465), 2649 states have return successors, (3723), 3411 states have call predecessors, (3723), 3465 states have call successors, (3723) [2022-12-14 13:20:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 49046 transitions. [2022-12-14 13:20:25,947 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 49046 transitions. Word has length 130 [2022-12-14 13:20:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:25,948 INFO L495 AbstractCegarLoop]: Abstraction has 37891 states and 49046 transitions. [2022-12-14 13:20:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 49046 transitions. [2022-12-14 13:20:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 13:20:25,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:25,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:25,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:20:26,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 13:20:26,175 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -433311877, now seen corresponding path program 1 times [2022-12-14 13:20:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:26,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909893928] [2022-12-14 13:20:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:26,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 13:20:26,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:26,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909893928] [2022-12-14 13:20:26,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909893928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:26,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139414821] [2022-12-14 13:20:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:26,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:26,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:26,301 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:26,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:20:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:26,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:20:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:26,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:20:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139414821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:26,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:20:26,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 13:20:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160039971] [2022-12-14 13:20:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:20:26,474 INFO L87 Difference]: Start difference. First operand 37891 states and 49046 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 13:20:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:30,305 INFO L93 Difference]: Finished difference Result 72706 states and 93468 transitions. [2022-12-14 13:20:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:20:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 132 [2022-12-14 13:20:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:30,392 INFO L225 Difference]: With dead ends: 72706 [2022-12-14 13:20:30,392 INFO L226 Difference]: Without dead ends: 48153 [2022-12-14 13:20:30,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:20:30,423 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 222 mSDsluCounter, 9400 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 12649 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:30,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 12649 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:20:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48153 states. [2022-12-14 13:20:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48153 to 45289. [2022-12-14 13:20:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45289 states, 37766 states have (on average 1.2997934650214478) internal successors, (49088), 37759 states have internal predecessors, (49088), 4338 states have call successors, (4338), 3279 states have call predecessors, (4338), 3183 states have return successors, (4731), 4251 states have call predecessors, (4731), 4338 states have call successors, (4731) [2022-12-14 13:20:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45289 states to 45289 states and 58157 transitions. [2022-12-14 13:20:33,723 INFO L78 Accepts]: Start accepts. Automaton has 45289 states and 58157 transitions. Word has length 132 [2022-12-14 13:20:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:33,723 INFO L495 AbstractCegarLoop]: Abstraction has 45289 states and 58157 transitions. [2022-12-14 13:20:33,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 13:20:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 45289 states and 58157 transitions. [2022-12-14 13:20:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 13:20:33,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:33,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:33,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:20:33,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:20:33,947 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -659759388, now seen corresponding path program 1 times [2022-12-14 13:20:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:33,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942365005] [2022-12-14 13:20:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 13:20:34,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942365005] [2022-12-14 13:20:34,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942365005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:34,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:34,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:20:34,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453784130] [2022-12-14 13:20:34,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:34,044 INFO L87 Difference]: Start difference. First operand 45289 states and 58157 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:38,272 INFO L93 Difference]: Finished difference Result 82008 states and 105165 transitions. [2022-12-14 13:20:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:20:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-12-14 13:20:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:38,379 INFO L225 Difference]: With dead ends: 82008 [2022-12-14 13:20:38,379 INFO L226 Difference]: Without dead ends: 52309 [2022-12-14 13:20:38,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:38,422 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 3387 mSDsluCounter, 3209 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:38,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 6426 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:20:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52309 states. [2022-12-14 13:20:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52309 to 51001. [2022-12-14 13:20:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51001 states, 43106 states have (on average 1.2795666496543405) internal successors, (55157), 43180 states have internal predecessors, (55157), 4383 states have call successors, (4383), 3513 states have call predecessors, (4383), 3510 states have return successors, (4929), 4308 states have call predecessors, (4929), 4383 states have call successors, (4929) [2022-12-14 13:20:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51001 states to 51001 states and 64469 transitions. [2022-12-14 13:20:42,290 INFO L78 Accepts]: Start accepts. Automaton has 51001 states and 64469 transitions. Word has length 127 [2022-12-14 13:20:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:42,290 INFO L495 AbstractCegarLoop]: Abstraction has 51001 states and 64469 transitions. [2022-12-14 13:20:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:20:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 51001 states and 64469 transitions. [2022-12-14 13:20:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 13:20:42,312 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:42,313 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:42,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 13:20:42,313 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:20:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 52711292, now seen corresponding path program 1 times [2022-12-14 13:20:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311918362] [2022-12-14 13:20:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 13:20:42,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311918362] [2022-12-14 13:20:42,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311918362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466042982] [2022-12-14 13:20:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:42,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:42,446 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:42,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:20:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:20:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:20:42,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:20:42,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466042982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615005367] [2022-12-14 13:20:42,860 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-12-14 13:20:42,861 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:20:42,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:20:42,861 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:20:42,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:20:55,218 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 215 for LOIs [2022-12-14 13:21:43,499 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 265 for LOIs [2022-12-14 13:21:57,836 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 161 for LOIs [2022-12-14 13:21:57,861 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 75 for LOIs [2022-12-14 13:21:57,873 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 90 for LOIs [2022-12-14 13:21:59,146 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 75 for LOIs [2022-12-14 13:22:09,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:22:27,504 WARN L233 SmtUtils]: Spent 15.90s on a formula simplification. DAG size of input: 476 DAG size of output: 425 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:23:07,440 WARN L233 SmtUtils]: Spent 24.20s on a formula simplification. DAG size of input: 835 DAG size of output: 555 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:23:17,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [615005367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:23:17,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:23:17,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [8, 8, 6] total 67 [2022-12-14 13:23:17,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112220826] [2022-12-14 13:23:17,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:23:17,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:23:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:23:17,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=3966, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 13:23:17,189 INFO L87 Difference]: Start difference. First operand 51001 states and 64469 transitions. Second operand has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 41 states have internal predecessors, (56), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 13:23:59,161 WARN L233 SmtUtils]: Spent 15.57s on a formula simplification. DAG size of input: 462 DAG size of output: 462 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:24:14,616 WARN L233 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 427 DAG size of output: 427 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:24:51,370 WARN L233 SmtUtils]: Spent 10.58s on a formula simplification. DAG size of input: 426 DAG size of output: 424 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:25:27,554 WARN L233 SmtUtils]: Spent 16.32s on a formula simplification. DAG size of input: 461 DAG size of output: 459 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:27:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:07,112 INFO L93 Difference]: Finished difference Result 98883 states and 123983 transitions. [2022-12-14 13:27:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-14 13:27:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 41 states have internal predecessors, (56), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 131 [2022-12-14 13:27:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:07,227 INFO L225 Difference]: With dead ends: 98883 [2022-12-14 13:27:07,227 INFO L226 Difference]: Without dead ends: 50958 [2022-12-14 13:27:07,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 317 SyntacticMatches, 20 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10051 ImplicationChecksByTransitivity, 189.9s TimeCoverageRelationStatistics Valid=2348, Invalid=23412, Unknown=0, NotChecked=0, Total=25760 [2022-12-14 13:27:07,285 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 616 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 53370 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 4534 SdHoareTripleChecker+Invalid, 53497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 53370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:07,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 4534 Invalid, 53497 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [127 Valid, 53370 Invalid, 0 Unknown, 0 Unchecked, 103.0s Time] [2022-12-14 13:27:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50958 states. [2022-12-14 13:27:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50958 to 50920. [2022-12-14 13:27:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50920 states, 43035 states have (on average 1.2795863831764842) internal successors, (55067), 43110 states have internal predecessors, (55067), 4375 states have call successors, (4375), 3511 states have call predecessors, (4375), 3508 states have return successors, (4921), 4299 states have call predecessors, (4921), 4375 states have call successors, (4921) [2022-12-14 13:27:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50920 states to 50920 states and 64363 transitions. [2022-12-14 13:27:10,908 INFO L78 Accepts]: Start accepts. Automaton has 50920 states and 64363 transitions. Word has length 131 [2022-12-14 13:27:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:10,908 INFO L495 AbstractCegarLoop]: Abstraction has 50920 states and 64363 transitions. [2022-12-14 13:27:10,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 41 states have internal predecessors, (56), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 13:27:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 50920 states and 64363 transitions. [2022-12-14 13:27:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 13:27:10,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:10,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:10,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:27:11,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4aeff22-fafe-425c-a9b4-2d1d79f1b52e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 13:27:11,132 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:27:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash 141019740, now seen corresponding path program 1 times [2022-12-14 13:27:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:11,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964436766] [2022-12-14 13:27:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:27:11,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964436766] [2022-12-14 13:27:11,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964436766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:11,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:11,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:27:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735873477] [2022-12-14 13:27:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:27:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:27:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:27:11,277 INFO L87 Difference]: Start difference. First operand 50920 states and 64363 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)